Electronics Module - Xerox PHASER 8500 Service Manual

Xerox printer user manual
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Electronics Module

Phaser 8400/8500/8550/8560 Color Printer Service Manual
The Electronics Module includes the main board, the power control board,
and the power supply. The Electronics Module is a Field Replaceable Unit
(FRU).
Main Board
The main board performs the image processing functions. Communication
ports on the board receive the print job image data and convert it to drive
signals for the Printhead. The main board also contains the mechanical
process controller, which commands the function of the power control board.
The main board sends signals through the power control board to the wave
amp board, which amplifies the signal that drives the jets on the Printhead.
The main board supports Non-Volatile RAM (NVRAM), memory, the hard
drive, input/output ports, and the configuration card.
NVRAM:
The NVRAM memory device, located on the main board, stores
Control Panel defaults, network settings, calibration data, copy counts, usage
profile data, and the printer serial number, which is also referred to as the
Engine Tracking Number (ETN). When the electronics module is replaced, the
NVRAM must be transferred to the main board in the replacement electronics
module.
Memory:
For Phaser 8400 printers, the main board supports two PC 133
compatible SO-DIMM SDRAM memory modules (128 to 256 MB). Phaser
8500/8550/8560 printers support SIMMs instead of DIMMs. Supported sizes
are 128, 256, and 512 MB. Printers ship with a minimum of 128 MB and
support a maximum of 1024 MB
Hard Drive Support:
the hard drive board. A separate power cable must plug into the power control
board from the hard drive board to provide signals and power for the hard
drive board.
Input/Output Ports:
Ethernet (not supported on the B and BD printer configurations), Parallel, and
USB 2.0 external I/O interfaces. For the 8500/8550/8560, the main board
provides support for Ethernet (all printer configurations), and USB 2.0
external I/O interfaces. The 8500/8550/8560 configurations do not include
parallel interfaces.
Configuration Card
The Configuration Card is a thumbnail-sized device that plugs into the side of
the Electronics Module. This device stores printer information and interacts
with the printer's NVRAM chip. The Configuration Card supports the transfer
of printer model and network configuration information from a failed printer to
a replacement printer. When replacing the electronics module, you must
transfer the Configuration Card to the replacement electronics module.
A hard drive IDE cable plugs into the main board from
In the Phaser 8400, the main board provides support for
Theory of Operation
2-19

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